Integrated government initiatives have become a common approach following the institutional fragmentation of New Public Management reforms. Complex societal issues require equally complex solutions, which sectorial units of government cannot attend to alone. However, integrated policy initiatives are prone to a range of obstacles. Using a study of policymaking aimed at homelessness in Norway as a case, this paper discusses how sectorial-shared knowledge creates barriers to a common view of policy problems and solutions. Engaging theories of governmental fragmentation, coordination, discourse, and epistemic cultures enable an exploration of how the involved policy sectors understand and address homelessness. The findings indicate that all policy sectors seem to recognise their responsibility within a social welfare frame, but despite having cooperated for several years, embeddedness in sectorial discourse and epistemic culture causes differing problem definitions. Established terms and categories within homelessness policies are filled with content according to epistemic embeddedness, thereby contributing to obscure the differences, rather than integrate the policy initiatives.